That really looks nice... but judging from their other products the number doesn't have any relevance to the resolution. Also take notice of a few things here..
The name of the PDF file is 'Vuzix_Wrap_920AV_Brochure.pdf'.
AV usually stands for Audio-Video, and I summise that it's probably HDTV format compatible res of 720x572 upwards, but not higher than 800x600 Real res.
Another give-away here is .. from their website.
Quote:
PCs & Laptops with S-Video
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S-Video is an analogue interface and inferior (resolution wise) to the digital I/Fs of todays graphics cards.
This tells me that the product is more geared for the Audio/Visual market where lower resolutions are more acceptable.
edt: A bit of sarcy here - Why would I watch TV through a pair of 'sunglasses' ? Then again I don't suffer from 'gadget-mania'
One thing that one must consider when looking for high-res, and good picture quality lcds, is that the LCD must have a digital interface (analogue I/Fs are generally not good enough). This makes this type of HMD a bit more bulkier than Vusixs glasses, but I think the trade-off will be worth it.